Exercise mat



FIG. 1 is an upper right front perspective view of the exercise mat of my design;

FIG. 2 is a front elevational view of the exercise mat of FIG. 1;

FIG. 3 is a right side elevational view of the exercise mat of FIG. 1, the left side is a mirror image thereof;

FIG. 4 is a top plan view of the exercise mat of FIG. 1;

FIG. 5 is a bottom plan view of the exercise mat of FIG. 1; and,

FIG. 6 is a rear elevational view of the exercise mat of FIG. 1. 

The ornamental design for an exercise mat, substantially as shown and described. 